What Do I Need To Do This?

[auggiereg]

What parts do I need to change from my stock Civic DX Sedan so that this set up will work? I already have the engine and tranny. The tranny has a flywheel, clutch kit, hydrolic clutch, and starter. The motor has head, intake manifold, all pulleys, fuel lines, and other minor things. What I really want to know is if I need to change the computer, A/C, distributor, throttle body, and things of that sort. Any answers or advice would be greatly appreciated. Thanks for all the help.

 

[sohcslammer]

I'm not sure but I think you will also need to swap TB, computer, and axles??? I really don't know to go from D15 to D16. Computer for sure tho...

 

[DeadCivic]

If you plan to change only the head, this will be your shop list:

D15B7 block
D16Z6 head
D16Z6/D16Y8 head gasket (the D16Y8 headgasket is almost 1/2 the size of the Z6, so it will up the compression some)
Civic VX timing belt
Civic HX spark plugs (not required but recomended)
D16Z6 ecu
D16Z6 intake manifold (including fuel rail and injectors)
D16Z6 distributor

You can get away with using a non-VTEC ECU and running the VTEC to a MSD RPM switch but the fuel maps will be all off. So I recommend getting a D16Z6 ECU.

Using the D16Z6 ECU you will have to run three wires to make VTEC work: the VTEC solenoid, VTEC oil pressure and VTEC oil pressure ground

For the tranny, 1st & 2nd gear basically are the same, so don't waste money. I sugest that you can use the 3rd gear of the EX on the DX and move the 3rd to 4th. Here are some points you can explore:

Hybrid tranny #1 Use a Civic CX 3rd gear for 4th gear in a SI/EX tranny.
Hybrid tranny #2 Use a ZC 3rd and 4th gear in a SI/EX tranny.

Here is what it would look like on paper...(I just copied and pasted this out of a file don't think all this is stored inside my head hehe)

This is the gear, gear ratio, shift points, and top speed in each gear at top rpm.

DX
1st----3.250---0000/6800---34.8mph
2nd---1.761---3685/6800---64.3mph
3rd----1.172---4526/6800---96.9mph
4th----0.909---5274/6800---124.5mph
5th----0.702---5251/6800---161.3mph
Final Drive---4.058

Si/EX/ZC
1st----3.250---0000/7200---35.2mph
2nd---1.900---4209/7200---60.2mph
3rd----1.250---4739/7200---91.6mph
4th----0.909---5236/7200---125.9mph
Choose your 5th
5th----0.702---5560/7200---163.0mph (EX coupe and EX sedan)
5th----0.750---5941/7200---152.6mph (SI HB and Del Sol SI)
5th----0.771---6107/7200---148.4mph (ZC)
Final Drive---4.250 (for the EX/SI, not sure what the ZC is)

Hybrid #1 using stock gears (CX 3rd for 4th)
1st----3.250---0000/7200---35.2mph
2nd---1.900---4209/7200---60.2mph
3rd----1.250---4739/7200---91.6mph
4th----1.066---6140/7200---107.3mph
5th----0.771---5207/7200---148.4mph

Hybrid #2 using ZC 3rd and 4th gears
1st----3.250---0000/7200---35.2mph
2nd---1.900---4209/7200---60.2mph
3rd----1.346---5101/7200---85.0mph
4th----1.033---5526/7200---110.7mph
5th----0.750---5228/7200---152.5mph

Hope you have fun....

 

[BigJ]

Si/EX/ZC
1st----3.250---0000/7200---35.2mph
2nd---1.900---4209/7200---60.2mph
3rd----1.250---4739/7200---91.6mph

So you are telling me my 93 si, when I rap out 3rd gear, I am going 91+ when I hit like 7500 rpms?

That's crazy, I dun have a speedsensor, so yeah, no speedo.